import subprocess

"""
demonstrates a bug with stdin. If a doskey macro is set from a script specified by
HKEY_CURRENT_USER\Software\Microsoft\Command Processor\AutoRun then any stdin piped to a
program executed by python will not be read.

The bug is either in python subprocess module or in Windows and can be reproduced with commandline

python.exe testsubproc.py <  mytxtfile.txt

The C++ code for stdintest.exe is:
---------------------------------------------------

#include <iostream>

void main(int argc, char* argv[])
{
	char mstr[2001];
	mstr[0] = 0;

	std::cout << "enter something on stdin\n";
	std::cin >> mstr;
	std::cout << "\nGot input from stdin:\n" << mstr;
}

----------------------------------------------------

The registry key could be:
----------------------------------------------------

HKEY_CURRENT_USER\Software\Microsoft\Command Processor\AutoRun\mymacros.cmd
----------------------------------------------------

and mymacros.cmd could be:
----------------------------------------------------

@doskey setVC64="C:\Program Files (x86)\Microsoft Visual Studio 8\VC\vcvarsall.bat" amd64 $T
@doskey setVC32="C:\Program Files (x86)\Microsoft Visual Studio 8\VC\vcvarsall.bat" x86 $T

----------------------------------------------------

mytxtfile.txt is any one-line text file

"""

def main():
    return subprocess.call(args=['stdintest.exe'], shell=True)


if __name__ == '__main__':
    main()